{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:LX5HCLNQ2LGMZDQF5W2TM3M5KA","short_pith_number":"pith:LX5HCLNQ","schema_version":"1.0","canonical_sha256":"5dfa712db0d2cccc8e05edb5366d9d50104fb01e176c7e222f962dcdf8e618a9","source":{"kind":"arxiv","id":"1811.05828","version":2},"attestation_state":"computed","paper":{"title":"An Accelerating Universe without Lambda: Delta~Gravity Using Monte Carlo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Joaquin Sureda, Jorge Alfaro, Marco San Martin","submitted_at":"2018-11-14T15:06:25Z","abstract_excerpt":"A gravitational field model based on two symmetric tensors, $g_{\\mu \\nu}$ and $\\tilde{g}_{\\mu \\nu}$, is studied, using a Markov Chain Monte Carlo (MCMC) analysis with the most updated catalog of SN-Ia. In this model, new matter fields are added to the original matter fields, motivated by an additional symmetry ($\\tilde{\\delta}$~symmetry). We call them $\\tilde{\\delta}$ matter fields. This theory predicts an accelerating Universe without the need to introduce a cosmological constant $\\Lambda$ by hand in the equations. We obtained a very good fit to the SN-Ia Data, and with this, we found the two"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1811.05828","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-11-14T15:06:25Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"7b59fc5874e7f5974501419b0a13bbf7a06d9a14ea17f54866ca69af5696cfac","abstract_canon_sha256":"92f9a06033cf71c21aec3785bf5a7b0bc8a501828c23dde583d6cc9898c6938f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:22.051111Z","signature_b64":"6rytNnqGftfvXZeMhD01EJoNbDIBSZUAMn2JAYzo/2rwkPOC8loLd8U0wYp6A+PXqjaFsygsqgYFUtblaWm/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5dfa712db0d2cccc8e05edb5366d9d50104fb01e176c7e222f962dcdf8e618a9","last_reissued_at":"2026-05-17T23:54:22.050436Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:22.050436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"An Accelerating Universe without Lambda: Delta~Gravity Using Monte Carlo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Joaquin Sureda, Jorge Alfaro, Marco San Martin","submitted_at":"2018-11-14T15:06:25Z","abstract_excerpt":"A gravitational field model based on two symmetric tensors, $g_{\\mu \\nu}$ and $\\tilde{g}_{\\mu \\nu}$, is studied, using a Markov Chain Monte Carlo (MCMC) analysis with the most updated catalog of SN-Ia. In this model, new matter fields are added to the original matter fields, motivated by an additional symmetry ($\\tilde{\\delta}$~symmetry). We call them $\\tilde{\\delta}$ matter fields. This theory predicts an accelerating Universe without the need to introduce a cosmological constant $\\Lambda$ by hand in the equations. We obtained a very good fit to the SN-Ia Data, and with this, we found the two"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.05828","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1811.05828","created_at":"2026-05-17T23:54:22.050547+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.05828v2","created_at":"2026-05-17T23:54:22.050547+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.05828","created_at":"2026-05-17T23:54:22.050547+00:00"},{"alias_kind":"pith_short_12","alias_value":"LX5HCLNQ2LGM","created_at":"2026-05-18T12:32:37.024351+00:00"},{"alias_kind":"pith_short_16","alias_value":"LX5HCLNQ2LGMZDQF","created_at":"2026-05-18T12:32:37.024351+00:00"},{"alias_kind":"pith_short_8","alias_value":"LX5HCLNQ","created_at":"2026-05-18T12:32:37.024351+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA","json":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA.json","graph_json":"https://pith.science/api/pith-number/LX5HCLNQ2LGMZDQF5W2TM3M5KA/graph.json","events_json":"https://pith.science/api/pith-number/LX5HCLNQ2LGMZDQF5W2TM3M5KA/events.json","paper":"https://pith.science/paper/LX5HCLNQ"},"agent_actions":{"view_html":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA","download_json":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA.json","view_paper":"https://pith.science/paper/LX5HCLNQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.05828&json=true","fetch_graph":"https://pith.science/api/pith-number/LX5HCLNQ2LGMZDQF5W2TM3M5KA/graph.json","fetch_events":"https://pith.science/api/pith-number/LX5HCLNQ2LGMZDQF5W2TM3M5KA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA/action/storage_attestation","attest_author":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA/action/author_attestation","sign_citation":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA/action/citation_signature","submit_replication":"https://pith.science/pith/LX5HCLNQ2LGMZDQF5W2TM3M5KA/action/replication_record"}},"created_at":"2026-05-17T23:54:22.050547+00:00","updated_at":"2026-05-17T23:54:22.050547+00:00"}